Shuttle-operating mechanism for sewing-machines



(No Model.)

' I P. DIEHL. SHUTTLE OPERATING MEGHANISM FOR SEWING MACHINES. No. 330,384. Patented Nov. 17 '1885.

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Witnesses:

from the crank on said shaft by a link and ilnir'rnn Srarns PHILIP DIEHL, or ELIZABETH, NEW

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JERSEY, ASSIGNOR TO THE SINGER MANUFACTURING COMPANY OF NEW JERSEY.

SPECIFICATION forming part of Letters Patent No. 330,384, dated November 17, 1885.

Application filed June 19, 1885. Serial No. 169,191.

To all whom it may concern:

Be it known that I, PHILIP DIEHL, a citizen of the United States, residing at Elizabeth, in the county of Union and State of New Jersey, have invented certain new and useful Improvements in ShuttleOperating Mechanisms for Sewing-Machines, of which the following isa specification, reference being had therein to the accompanying drawings.

The object of my invention is to produce a light running shuttle operating mechanism for sewing-machines of such construction that the tendency of the shuttle-lever to spring when in operation and the vibratory jar of the machine incidental thereto will be almost en tirely avoided. I accomplish this object by pivoting the shuttle-lever to the bed-plate of the machine between the vertical drivingshaft and the shuttle-race, and operating said lever intermediate lever.

In the drawings, Figure 1 is a sectional elevation of a sewing-machine embodying my invention, and Fig. 2 is a bottom view of the same.

A indicates the bed-plate of the machine, and B the bracket-arm thereof. J ournaled in the upper portion of the bracket-arm is the horizontal driving-shaft 0, having a bevelgear, a, meshing with a similar gear, 66, on the upper end of a vertical counter-shaft, D, the latter having at its lower end a crank, E.

F is the shuttle-lever, which is pivoted on a stud, a, attached to the bed-plate, between the vertical shaft D and the shuttle race a, said lever being provided at its forward end with the usual shuttle-carrier, f, adapted to support and drive the shuttle e.

G is a bell-crank or driving-lever pivoted on a stud, aflattached to the bed-plate between the pivotal point of the shuttle-lever and the shuttle'race. One arm, of said bell-crank lever is forked to embrace a stud, f, on the shuttle-lever, and the other arm, 9, thereof is connected by a link or pitman, H, with the crank E. The shuttle and bell-crank levers have different radii, and a loose connection between them is afforded by the slotted or forked arm g of the latter. It is necessary for the shutt1e-carrier to vibrate closely to the (No model.)

under side of the bed-plate, so that the shuttle may be as near as possible to the needle and the work; and to enable the shuttle-lever to swing across or beneath the pivot-pin or stud of the bell-crank or driving lever, and to carry on its upper side the studf for engagement with the latter lever, the shuttle lever is provided with inclines or bends f f, so that the rear end of the latter lever is at a suitable distance below the bed'plate. Motion being imparted to the driving and vertical shafts, the crank on the lower end of the latter, being connected by the link H'to the bellcrank lever G, will cause said lever and the shuttle-lever to vibrate, as will be readily understood. The shuttle-lever, being pivoted between the vertical shaft and the shuttle-race, is comparatively short, and the power being applied thereto between the fulcrum and the forward end of the lever, it is very rigid in operation, and thus the objection incidental to shuttle-levers as ordinarily constructed in which the spring varies greatly between slow and fast speeds, is nearly or wholly avoided.

In fact, my shuttle-lever, constructed and operated as hereinbefore described, really amounts to a shuttle-carrier having a smooth and easy reciprocating movement with very little vibratory jar even at very high speeds. By arranging the driving-lever so that its fulcrum is between the fulcrum of the shuttlel'ever and the shuttle-race, or, in other words, within the space bounded by lines drawn from the shuttle-lever pivot-pin to the ends of the shuttle-race, the driving-lever is placed more closely to the shuttle-lever, and the movements of the former are more directly applied to the latter than would otherwise be possible, thus securing a compact arrangement of these parts, which is desirable in a light -running high-speed machine.

I do not claim the feed-operating mechanism herein shown in this application, as the same is claimed in my application No. 169,300, filed June 20, 1885.

Having thus described my invention,I claim and desire to secure by Letters Patent In a sewingmachine, the combination, with the bed-plate, bracket-arm, horizontal and vertical shafts, and their gearing, of a shuttle-lever pivoted at its rear end to the said bed-plate between the said vertical shaft and the shuttle-race, a driving-lever having its fulcrum between the fulcrum of the shuttlelever and the said shuttle-race and loosely connected with said shuttle-lever between the fulcrum of the latter and the shuttle-carrier, and connections between said vertical shaft and driving-lever, substantially as set forth.

2. In a sewing-machine, the combination, with the bed-plate, bracket-arm, horizontal and vertical shafts and their gearing, of a shuttle-lever pivoted at its rear end to said bed-plate between said vertical shaft and the shuttle-race, a bellcrank lever loosely connected with said shuttle-lever, a crank on said vertical shaft, and a link or pitman connecting the said crank and the bell-crank lever, substantially as set forth.

3. In a sewing-machine, the combination, with the bed-plate thereof, of a shuttle-lever pivoted thereto and having a stud on its upper side andinclines or bends, a driving-lever loosely connected to said shuttle-lever and having its pivotal point forward of the pivotal point of the shuttle-lever, and mechanism for operating said driving-lever, substantially as set forth.

4. In a sewing-machine, the combination, with the bed-plate, bracket-arm, horizontal and vertical shafts, and their gearing, of a shuttle-lever pivoted at its rear end to said bed-plate and having a stud on its upper side and inclines or bends, a bell-crank drivinglever forked to embrace said stud and pivoted forward of the pivotal point of the shuttle' lever, a crank on said vertical shaft, and a link or pitman connecting the said crank and the said bell-crank lever, substantially as set forth.

5. In a sewing-machine, the combination, with the bed-plate, of a shuttle-lever pivoted at its rear end to said bed-plate, a bell-crank driving lever loosely connected with said shuttle-lever between the pivotal point of the latter and the shuttle-carrier, and mechanism for operating said bell-crank lever, substantially as set forth.

In testimony whereof I affix my signature presence of two witnesses.

' .PHILIP Witnesses:

J. G. GREENE, H. J. STRATEMEYER, Jr. 

